/Engine/Plugins/Enterprise/DatasmithImporter/Source/DatasmithImporter/Public/UVTools/UVGenerationUtils.h
Setup the a good lightmap minimal resolution for the given static mesh LOD in its build settings.
static void SetupGeneratedLightmapUVResolution ( [UStaticMesh](API\Runtime\Engine\Engine\UStaticMesh) * StaticMesh, int32 LODIndex )